CVE-2021-47055 (GCVE-0-2021-47055)
Vulnerability from cvelistv5
Published
2024-02-29 22:37
Modified
2025-05-04 12:40
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mtd: require write permissions for locking and badblock ioctls MEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require write permission. Depending on the hardware MEMLOCK might even be write-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK is always write-once. MEMSETBADBLOCK modifies the bad block table.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/077259f5e777c3c8821f6b41dee709fcda27306b Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/1e97743fd180981bef5f01402342bb54bf1c6366 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877e Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/a08799d3e8c8088640956237c183f83463c39668 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcaf Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424bee Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/077259f5e777c3c8821f6b41dee709fcda27306b Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/1e97743fd180981bef5f01402342bb54bf1c6366 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877e Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/a08799d3e8c8088640956237c183f83463c39668 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcaf Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424bee Patch
Impacted products
Vendor Product Version
Linux Linux Version: 1c9f9125892a43901438bf704ada6b7019e2a884
Version: 583d42400532fbd6228b0254d7c732b771e4750d
Version: 389c74c218d3b182e9cd767e98cee0e0fd0dabaa
Version: ab1a602a9cea98aa37b2e6851b168d2a2633a58d
Version: 9a53e8bd59d9f070505e51d3fd19606a270e6b93
Version: f7e6b19bc76471ba03725fe58e0c218a3d6266c3
Version: f7e6b19bc76471ba03725fe58e0c218a3d6266c3
Version: f7e6b19bc76471ba03725fe58e0c218a3d6266c3
Version: f7e6b19bc76471ba03725fe58e0c218a3d6266c3
Version: 36a8b2f49235e63ab3f901fe12e1b6732f075c2e
Version: eb3d82abc335624a5e8ecfb75aba0b684e2dc4db
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47055\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-29T23:15:07.473\",\"lastModified\":\"2025-01-09T15:34:43.780\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmtd: require write permissions for locking and badblock ioctls\\n\\nMEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require\\nwrite permission. Depending on the hardware MEMLOCK might even be\\nwrite-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK\\nis always write-once.\\n\\nMEMSETBADBLOCK modifies the bad block table.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux se ha solucionado la siguiente vulnerabilidad: mtd: requiere permisos de escritura para bloqueo y badblock ioctls MEMLOCK, MEMUNLOCK y OTPLOCK modifican los bits de protecci\u00f3n. Por lo tanto, requiere permiso de escritura. Dependiendo del hardware, MEMLOCK podr\u00eda incluso ser de escritura \u00fanica, por ejemplo, para flashes SPI-NOR con su WP# vinculado a GND. OTPLOCK siempre se escribe una vez. 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      "cveMetadata": "{\"cveId\": \"CVE-2021-47055\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T12:40:58.929Z\", \"dateReserved\": \"2024-02-29T22:33:44.293Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-29T22:37:30.071Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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